Hello Aspirant

After B.Sc in chemistry you can't do M.sc in IT. You must have an undergraduate degree in IT.

As these two are totally different courses which are not related to each other. 

So , you are not eligible for M.Sc IT

If you have any further questions do ask.

Thank you

Hello,
After BSc you are definitely eligible for MSc in Chemistry.
Many colleges provide MSc program in their college like Delhi University, BHU, IISc, many IIT's etc.
Prepare well because for many you have to appear for entrance exam.
But if you're asking for MSc. In IT then no you cannot apply for it as it would require BSc in Computer science.
All the best